The user wanted to give cash to the FSF after hearing that its president Richard Stallman had had his bag stolen in Argentina. Mr Stallman's wallet, medicine and laptop were taken in the theft.

The Free Software Foundation campaigns to promote the idea that people should be free to use, create and modify software.

When the Reddit user investigated, he found his employer was using Microsoft's Threat Management Gateway to filter the websites visited by workers. The primary FSF donation page was blocked, said the gateway, because it had been flagged as a gambling site.